Gear-case.



G. H. HURTEAU.

em CASE.

APPLICATION FILED AR. 26. 191} 1,174,072. Patented Mar. 7, 1916.

I 2 HEETS-SHEE] BY 0 4/114 77 ATTORNEY.

U A E T R U H um Gm a 9 an 2 EM S Co E onL H F. GM 0 T A C L P P A Patented Mar. 7, 1916.

2 SHEETS-SHEET 2 IN VEN TOR George W/MESSES:

BY WM 0 4 71- M ATTORNEY.

ml OLUMIIA I'LANOOIANI cm, WAININOTON. n. t-

UNITED STATES PATENT OFFICE.

GEORGE H. HURTEAU, OF AURORA, ILLINOIS, ASSIGNOR TO ELECTRIC SERVICE SUPPLIES COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

GEAR-CASE.

Specification of Letters Patent.

Patented Mar. 7, 1916.

Application filed March 28, 1913. Serial No. 756,910.

T all whom it may concern:

Be. it known that I, Geoaoa H. HUa'rnAU, a citizen of the United States, residing at Aurora, in the county of Kane and State of Illinois, have invented certain Improvements in Gear-Cases, of which the followin" is a specification.

IvIy invention is designed primarily to provide a gear case that will more satisfactorily protect the motor or driving mechanism suspended under cars and withstand the severe service attending this use.

Gear cases carried beneath electric cars are subject to constant vibration and severe strains under normal conditions of use, and are-liable to receive shocks or blows due to rocks or other obstacles on the track, the effects of which have been, with constructionsv heretofore used, to cause rapid deterioration of such cases and to permit injury to the machinery which it is the function of thecases to protect.

The 1 improvements of my invention are characterized by the combination of parts so as to avoid structural weaknesses, to provide peculiar reinforcement for the case where failure is most liable to occur, and, by the use of peculiar means for preventing movement at the joints, to eliminate shearing strains on rivets and consequent wear and failure.

The peculiar features of my im rovements are fullydisclosed in the fol owing description and the accompanying drawin s in illustration thereof.

11 the drawings, Figure 1 is a perspective view of a gear casin made in accordance with my invention; Fig. 2 is a erspective view of a second form thereof; ig. 3, Fig. 3", Fig. 3", and Fig. 3' represent perspective views of successive stages in making the sides of the case; Fig. 4, Fig. 4" and lug. 4 represent perspective views of successive stages in making the periphery strips; Fig. 5 is a vertical sectional view taken transversely through a case embodying m improvements; Fig. 6 is a part sectiona perspective side elevation of the case shown in Fig. 2; Fi .7 is a vertical sectional view taken longitudinally through the left end of the case shown in Fig. (5, and Fig. 8 is a vertical sectional view takcn'longitudi nally through the right end of-the case shown inFig. 6.

The sides of the case are formed from steel sheets 1 which are cut to form oval blanks 2 and these blanks are pressed to form pans 3 which are divided longitudinall with the production of the sections 4 having the flanges 4 joined thereto by the sections 4" of easy curvature, of such charactor as to avoid straining the metal, the divided parts being symmetrical with reference to the plane of division.

The peri hery of the case comprises strips 5 formed rom sheet steel plates 5 having the depressed edges 5 and the hems or inturned laminations 5*.

The case is made in separable top and bottom sections, formed by joining right and left hand parts i by parts 5, wluch are fixed together with the parts 4' lying on the parts 5 in abutting relation to the relatively offset central or body part of the strips 5, and with the parts 5' and 5 sprung by the pres sure thereon of the parts 4 so as to substantially conform to the curved sections 4", whereby the sides are stayed. Rivets 6 are passed throu h and draw together the laminated parts 4 5 and 5, and spot welds 7 are formed electrically along the edge of the seam to integrally connect the parts 4:, 5' and 5" at the points of welding whereby there is eliminated the relative movement, wear and consequent failure which eommonly takes place at the mechanically connected joints of usual cases.

Curved reinforcing plates 8 and 9 are riveted to the upper section of the case against the inner surface of the ends of the periphery strip 5 therein so as to lap the ends of the strip 5 of the other half of the case, and curved reinforcing plates 8' and 9 are riveted to the lower section against the ends of the periphery strip 5 thereof and so as to make butt oints with the respective parts 8 and 9. Longitudinal strips 10 are nod to the sides 4 of the bottom section of the casing and combine with the inset edges 4" thereof to provide seats for the sides 4 of the upper half of the case.

As shown in Fig. 1, the two halves of the case are fastened to ether by the peripheral plates 11 riveted thereon and having the parallel flanges 11 clamped together by. the

olts 12; and the case is sup orted by the brackets 13, 14 and 15 riveted to the upper half thereof.

As shown in Figs. 2 6, 7 and 8, the two halves of the case are fastened together and bend but-will not break the ease by reasonof the mannerin which the joints are made, the case remains strong and tight because the spot welding not only reduces the number of rivet holes otherwise required but the rivets are subject to tensile stress only so that iisual wear of the metal is avoided, and the use of spot weldin in lace of'continuous welding avoids the eterioration of the metal due to heating in. making an all welded joint, hence the combination of spot welding with riveting avoids the defccts of an all riveted and of an all welded construction.

Having described my invention, I claim:

1. A gear case havingsides with inturned flanges, a periphery strip having edges comprising juxtaposed lamination's bearing against said sides within said flanges, and means for fixing said flanges and edges together. v

2. A gear. ease having sides with intui'nod flanges connected therewith by curved sections, a periphery strip having edges with inturned laminations conforming substantially to said curved sections and providing an interior su port for said sides, and means for fixing said flanges 'and'edges together.

8. A earcase havingside's provided with v inturne flanges a periphery strip having edges lying wit in said fian ee, and mechanical means and spot wel ds as fixing said flanges and edges together.

4. A gear ease comprising a side "and a periphery connected by a joint having rivets and spot welds. I

5. A our case having 'parts connected by alternating rivets and spot welds.

6. A gear case havin sides with inturned flanges, a eripheay strip having laminated edges witiin sai flanges, rivets passing through said flanges and edges, and spot Copies of this welds integrally connecting the laminations of said edges and said flanges.

7. A gear case having sides with inturned flanges, a peri hery stri having an oilsct part against wliich the ct ges of said flanges --abut and laminated edges lying within said flanges in engagement with said sides. and

, means for fixing said flanges and edges together.

8. A gear case comprising sides having intnrned flanges connected therewith by curved sections, periphery strips having laminated edges within said flanges, said edges being sprung and bearing against said sides, and means for fixing said flanges and edges together.

9. A gear case comprising separable sections having sides with inturued flanges, periphery strips having edges with inturncd laminations on which said flanges are fixed, and end plates fixed within said sections against the ends of said strips.

10. A gear case comprising separable sections having sides with inturned flanges. periphery strips having edges on which said flanges are fixed, and end plates fixed within said sections against ends of said strips, the end plates aforesaid forming lap joints with the ends of com lementary periphery strips separable there rem.

11. A gear case comprising separable sections having sides with inturned flanges, periphery strips havin edges on which said flanges are fixed, on plates fixed within said sections'against ends of 'saidstrips, and end plates fixed'on said flanges and ends oi. said periphery strips, said last named end plates having flanges thereon whereby said sections are eld together.

In testimony whereof I have hereunto set my name this 15th day of March, 1913, in the presence of the subscribing witnesses.

GEORGE l-l. HUR'IEAU.

Witnesses:

JOHN G. Bnnscrmrr, Gova M. Rosanna.

by addressing the "Commissioner 0! Patents.

Washington, D. 0. 

